Sharp angles and elbows in ductwork create turbulence which in turn causes airflow reduction.  Turning vanes are used to minimize the turbulence and help the air "make the turn". Commercial grade Dyn-O-Rails are made with sturdy 23-gauge steel, embossed for stiffness, and can be used with either single or hollow vanes up to 16 gauge steel. Dyn-O-Rails incorporate relief holes in slots to allow for support for the vanes during assembly and beveled edges that remain straight to ensure better contact.

Product #308088 - (1) 100' Roll Dyn-O-Rail (4" nominal width)
Product #308089 - (2) 100' Rolls Dyn-O-Rail Junior (2" nominal width)